ProjectileMutation.java example

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ProjectAres-master
package tc.oc.pgm.mutation.types.kit;

import com.google.common.collect.Range;
import org.bukkit.Material;
import org.bukkit.enchantments.Enchantment;
import org.bukkit.entity.LivingEntity;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.EventPriority;
import org.bukkit.event.entity.ProjectileHitEvent;
import org.bukkit.inventory.Inventory;
import org.bukkit.potion.PotionEffect;
import org.bukkit.potion.PotionEffectType;
import tc.oc.commons.core.random.ImmutableWeightedRandomChooser;
import tc.oc.commons.core.random.WeightedRandomChooser;
import tc.oc.commons.core.util.Optionals;
import tc.oc.pgm.killreward.KillReward;
import tc.oc.pgm.kits.FreeItemKit;
import tc.oc.pgm.kits.ItemKit;
import tc.oc.pgm.kits.Kit;
import tc.oc.pgm.match.Match;
import tc.oc.pgm.match.MatchPlayer;
import tc.oc.pgm.mutation.types.KitMutation;

import java.util.List;
import java.util.Optional;

public class ProjectileMutation extends KitMutation {

    final static WeightedRandomChooser<Enchantment, Integer> ENCHANTMENTS = new ImmutableWeightedRandomChooser<>(EnchantmentMutation.BOWS_MAP);
    final static WeightedRandomChooser<PotionEffectType, Integer> POTIONS = new ImmutableWeightedRandomChooser<>(PotionMutation.BAD_MAP);

    final static Range<Integer> ENCHANT_RANGE = Range.closed(1, 3);
    final static Range<Integer> AMPLIFIER_RANGE = Range.closed(0, 3);
    final static Range<Integer> DURATION_RANGE = Range.closed(3, 10);

    final static ItemKit BOW = new FreeItemKit(item(Material.BOW));
    final static ItemKit ARROWS = new FreeItemKit(item(Material.ARROW, 16));

    public ProjectileMutation(Match match) {
        super(match, false);
        this.rewards.add(new KillReward(ARROWS));
    }

    @Override
    public void apply(MatchPlayer player) {
        super.apply(player);
        Inventory inventory = player.getInventory();
        inventory.all(Material.BOW).values().forEach(arrow -> arrow.addUnsafeEnchantment(ENCHANTMENTS.choose(entropy()), entropy().randomInt(ENCHANT_RANGE)));
    }

    @Override
    public void kits(MatchPlayer player, List<Kit> kits) {
        super.kits(player, kits);
        Inventory inventory = player.getInventory();
        if(!inventory.contains(Material.BOW)) kits.add(BOW);
        if(!inventory.contains(Material.ARROW)) kits.add(ARROWS);
    }

    @EventHandler(ignoreCancelled = true, priority = EventPriority.HIGHEST)
    public void onProjectileHit(ProjectileHitEvent event) {
        Optionals.cast(Optional.ofNullable(event.getHitEntity()), LivingEntity.class)
                 .filter(entity -> Optional.ofNullable(event.getEntity().getShooter()).filter(shooter -> shooter instanceof Player).isPresent())
                 .ifPresent(entity -> entity.addPotionEffect(new PotionEffect(POTIONS.choose(entropy()), 20 * entropy().randomInt(DURATION_RANGE), entropy().randomInt(AMPLIFIER_RANGE)), true));
    }

}